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  Author: 善良的YWJ
  Created by shanliangdeYWJ on 2020/09/09
  File: 05.3解决异步设置值每个组件都是独立的.html
  Description: "
  
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  Github: https://github.com/shanliangdeYWJ
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<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1" />
  <meta name="keywords" content="" />
  <meta name="description" content="" />
  <title>08.2正确使用key的位置</title>
</head>

<body>
  <div id="root"></div>

  <!-- 加载 React。-->
  <script src="../js/react@16.development.js"></script>
  <script src="../js/react-dom@16.development.js"></script>
  <script src="../js/babel@6.min.js"></script>

  <!-- 加载我们的 React 组件。-->
  <script type="text/babel">

    function ListItem(props) {
      return (<li>{props.value}</li>)
    }

    // 一个好的经验法则是：在 map() 方法中的元素需要设置 key 属性。
    function NumberList(props) {
      const numbers = props.numbers;
      const listItems = numbers.map((number) =>
        <ListItem key={number} value={number * 2} />
      );
      return (
        <ul>{listItems}</ul>
      );
    }

    const numbers = [11, 22, 99, 98, 95, 96];
    ReactDOM.render(
      <NumberList numbers={numbers} />,
      document.getElementById('root')
    );


  </script>
</body>

</html>